48 GB DDR3 ECC Registered (PC3-12800, DDR3-1600MHz)- (6 x 8GB) For Dell Poweredge C6145, C6220, C8220, C8220x, M420, M520, M620, M820 & M915. Major brand DIMMs manufactured by Hynix, Micron & Samsung. ECC Registered DIMMs & ECC UDIMMs can not be mixed.If your system came with ECC UDIMMs then use of registered DIMMs will require removal of all exisiting UDIMMs. Operational memory speed is controlled by CPU type and number of DIMMs installed. EFetcher's mission is to provide its customers a variety of computer products and excellent service at affordable prices. Over 24 years in business. Over 500,000 satisfied customers. The item "48GB(6x8GB) DDR3 1600 Dell PowerEdge C6145 C6220 C8220 M420 M520 M620 Memory Ram" is in sale since Sunday, July 17, 2016. This item is in the category "Computers/Tablets & Networking\Computer Components & Parts\Memory (RAM)". The seller is "efetchercom" and is located in Lake Forest, California. This item can be shipped to United States, all countries in Europe, all countries in continental Asia, Canada, Mexico, Australia.